Apparatus for feeding fuel to furnaces.



A. HEBERER & H. A. HYNE.

APPARATUS FOR FEEDING, FUEL T0 FURNACES.

APPLICATION FILED APB.19,1910.

' I 1,022,550.. Patented Apr.9,1912.

. mmf

A. HEBERER & H. A. HYNE.

APPARATUS FOR'FEEDING FUEL T0 FURNACES.

APPLIOATIOKFILED APR.19,1910.

. Patented Apr. 9, 1912.

5 SHEETS-SHEBT 2.

A. HEBERER & H. A. HYNE..

APPARATUS FOR FEEDING FUEL TO FURNACES.

APPLIOATIOH FILED APR.19,,1910.

Patented Apr. 9, 1912 5 sums-sum s.

A. HEBERER & H. A. HYNE. APPARATUS FOR FEEDING FUEL TO FURNACES.

. APPLICATION FILED APR.19,1910.

Patented Apr. 9 1912.

5 SHEETS-SHEETA.

gllli'lillll v A. HEBERER & H. A. HYNE. APPARATUS FOR FEEDING FUEL TO FURNACES.

APPLICATION FILBDYAPRJQ, 1910. 1,022,550. Patented Apr. 9, 1912.

5 SHEETSSHEET 5.

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Hoe/7' brat-RE HE /s y 7. fl/A/ v W AEPARATUS FOR FEEDING FUEL TO FURNACES.

jg Specificatim: 0f Letters Patent. Pqfiiiggghg il A'ig g, S3 11$ Application filediipi'il 19. 191*]. Serial No 556,323.

boiler. 01' siwam generniiiix showing 'iis zip piimiiimi of the :rpimrains of (miinvention. Fig. is from" clevzii'ion (if :1 boiler show ing the appzwni'us our ixmwtion iion. F551 3 sii ie viei'aiinn 0 pan of HM: side being broken away Hie u wi'niinn (if Hie zippm'a 'us=..

jiwt of ihe King of firms i'i'fziin. residing at iwinmniy. minty z Cmmi'Y of iizlmetin.

0 show 0 (f-iiiifGfZiiih hum izii'mimi 110w mni useful Fikit eievziiinii on larger semis :4! .Y'im', inmruvenieni in am fippzii'aiius 01' Needing 1 mg 1" PUI'iiUH of the i eci'iing :imi (iisii'iii zmw-hzmism. Fig, is a pi i 'liu': mm-imnism SIHHYI! in 0nd 02 the same mp2 air ports. Figs 7 is a mndif'czition of the fuel (i Fig. 8 is fni'im'ving; is

0 Furnaces of which the a spsvificanon.

511C)? and iiisiribuiing "elsi'es i0 iinpi'ovemcnis in on ining meciia plan or i0p-view of 8m mun gvneraiors, and

15 in A13 in the axis :1 nil immui'acanism.

in ie generated and 21]) mechanism sns'wn in Fig. 7. Fig. 9 s qemi] of an asbesios 017 other ire-proof curiain used in commotion with 51:: apparaius The apparatus may be ai'mnge in c0i1- nection with any furnace, Wi'iQflH-i such furnace is combiner} wiih as'ieam gmiei'atoig any other appm-a'ms designer} to be stinj-sci'ed to heat in the present airmvingxs H19 5 and relates more 0 an appaiwitus for distributsuch as pm 00211 or screenings area of the gizzts and to Km: (*0 -ti'oiiiiig uni? reg iiziiing i'the 1 ,u ii g zipnriuitus. ide

on is ie pro-v device is simvn attached to a steam 'naticzi ll'y to a s: ioiand the descripi'ion will apply t0 such application although it is to ifii, imiei'si'omi .thai Til: use 01 construvfiinn of the apparatus is not in be restricted by such descripticn.

The coal to be fed to'ixhe furnace is placed in the iioppe; 2, which may be of my suitable conslruciimi and held suspemivd in flOZ'li off the fui'i'iace by any desimbic means, either by ziitacliing it directiy iozihs from of I The boiler, 01 by suspending it freiii any iiimniian is to pmwhich will l gin him miiaziiii. 1". alien (21% id cmitiois of Q ihe amouni of can m if sins-k9 generated in Iiiie suii'nii-ie frameqvai'k. The hopper 2 is prefcmnimsimn M ii): fueii erzxiiiy prm'i'ied with sloping sides sei- "f'u ihese C L10 the coal to the center at the botimm.

i The 6611' mi bottom portion of ihe hop ier i f is prefci'abiy formed into a cylindrical i signal} m mthes 1 121g; 4, I H'YE'DQ a pzirtiaiiv restricted v 1 e M r is mad for rotation in (he on the mic of rotation 5i r'iibie rotary mniion applied in bile iii I 7 *am (he shzifi T, which is (i: a 25,

vmisiaiit spec? 'frmn any suitable swarms pmi'w, s s

varying fmm i screw. By siiifr ng tbs sitimi of the Miller 8,80 that i m ni-(113i; with the 9 is 11313 V rutaiimymf the screw is aiiiie :v cz'lsii ig 13 is preferably arranged amunci the shaft 12 in the hopper E2 to p 'ir' 'emiic n.

efisvation of a doubie point 0 vent the coal from coming in contact with the shaft.

The movement of the friction roller 8 1011- gitudinally of the shaft may be eflected by hand, whenever it is desirable to vary the amount of fuel being fed, or it may be arranged to operate automatically. In the present instance, in the application of the feeding mechanism to a steam generator the feeding apparatus has been arranged to operate automatically under the variations of the steam pressure in the generator. In thedravvings is indicated a regulator 15 such as is used at the present time for regulating the pos1- tion of the damper in the flue and we have modified such mechanism and connected it to the roller 8 by the lever 16, so that an increase in pressure in the generator will move the roller 8 toward the edge of the disk 9 and thereby cause a decrease in the amount of fuel fed. In the application of the device to other fuel consuming apparatus, various other forms of regulators may be employed to accomplish the same result and maintain the fire at any desired tenn'ieralure. The

' coal being of a line composition or texture,

' erably extending across the it is evident that it will readily move under the action of gravitvand tend to How out of the orifice 5, and the oflice of the screw 6 is to retard and regulate such motion, so that only the desired quantity of coal may be fed to the furnace.

From the chamber 4 the coal passes through the conductor 17 to the spout 18 from whence it is discharged into the furnace. The conductor 17 may be made of a flexible material, such as is used in the manufacture of rubber hose, or may be made of a metal casing with slip joints to provide for extensions. The spout 18 moves across the front of the furnace and the distance from the chamber 1 to the spout 1S varies with such motion, causing an extension andcon traction of the conductor 17. I

The spout 18 projects into the furnace chamber 19 through a. slot or opening 21 in the front wall 22 thereof, said slot 21 prefthe furnace. An injector 23 in the end of the spout 18, furnishes the power for discharging the coal into the furnace and'onto the grate surface 2-1. The injector is preferably operated by steam taken directly from the boiler, although this may be varied according to conditions. When steam is used, a number of air ports 25 are provided in the outer end of the spout behind the injector, so that a quantity of 'air will be drawn in and discharged over the bed of burning fuel, thereby greatly increasing the combustion of the gases and decreasing the amount of smoke generated.

It has been found advisable to use superheated steam in some cases and for this purpose the steam conductor tubes .26 on entire width of" Fig. 1 are arranged to be connected to the superheater pipes, Within the furnace. For the purpose of spreading and distributing the coal'over the width of the furnace and thereby obtaining a more even comb-ustion, the discharge spout 18 is arranged to travel back and forth across the front of the furnace. Any suitable means may be employed for causing such travel, and in the embodiment herein illustrated, a feed screw 27 is employed, extending across the furnace. boilers or furnaces to employ more than one Where it is found desirable on larger spout on the furnace, several may be 81'? ranged, each adapted to travel across a portion of the entire width.

The feed screw 27 engages in the bearing 28 having a screw-threaded inner surface which is preferably formed integral with the head 29 in which the spout 18 is fastened. As the feed-screw revolves the spout is therefore moved across the Width .of the furnace. To provide for reversing: the direction of rotation of the feed-screw 27 the belts 31 and 32 have been provided, running on pulleys on the shaft 7 and on the extension of the feed-screw 27. This method of reversing the direction of rotation by means of crossed belts and tight and loose pulleys is old and well known and requires no further explanation. It is however, generally advisable to provide means for automatically shifting the belts as the spout nears the side of the furnace. This maybe accomplished in ,many ways, and in this instance a belt shipper rod 33 extending across the front of the furnace is provided with projections 34, lying in the path of the spout,

so that the belts will be automatically For" the purpose of spreading and distributing the coal over the depth of the furnace as the spout 18 moves laterally, the

deflecting plate 35 has been arranged over the discharge end thereof. The deflecting plate 35 in the present instance is hinged to V collar 86, attached to the end ofthe spout'lS and is adapted to be partially rotatett about the pivot 3'? to deflect the coal as it issues from the spout. It is evident that when the plate is raised the path of the coal is not obstructed and it will be projccted to the rear of the furnace, but as the plate S t moves downward partially closing the opening the coal is deflected from its path and moves in another path depending upon the position of the plate. In Fig. 3

the path of the coal for two positions of the deflector plate is shown. In this manner by slowly raising and lowering the deflector plate, the coal is projected for a greater or less distance into the furnace thereby equally distributing the coal over the entire surface. The shape of the plate which is moved across the furnace, so that the dis- "28, which moves tribution of the fuel will be even over the entire area of the grate. In Figs. 4 and 5 is set forth a method for accomplishing this result. Extending across the face of the furnace is the plate 38, provided with a zig zag or cam-shaped groove 39. A roller on the rod 41 engaging in the groove 39 is restrained from longitudinal motion by the slot 42 in the casting 29. Therefore, as the casting and the spout move across the fur nace, under the'influence of the screw 27, the rod 41 carrying the saddle 43 rceiprocates in the slot 42. This reciprocating motion is transferred to the plate 35 through the sleeve 4A on the saddle i3 and the connecting rod 45 and lever 46. The arc of rotation of the plate 35 1na-y be varied by varying the length of theconnecting arm 45, by means of the lock nuts 47 onopposite sides of the sleeve is.

In Figs. 7 and 8 is shown a modification of the means for operating the deflector plate. .The rod 45 which operates the deflector plate 35 is connected to a collar or band 50 lying around the eccentric 56 so that as the eccentric is revolved the rod 45 is reciprocated to operate the deflector plate.

The eccentric plate 56 is attached to the hub 57 which is provide "1 with a projection 58 which fits loosely in a slot 59 in the feed screw 27. The hub 57 is thereby constrained to rotate as the feed screw rotatesand thereby operates the rod 45 through the eccen tric 56. Longitudinal motion of the hub 57 is obtained by connecting it to the bearing longitudinally under the action of the feed screw 27. The connection between the hub and the bearing is generally formed by causing projections on the bearings to engage in agroove 61 in the hub, thereby allowing the hub to be rotated by the rotation of the feed screw.

For the purpose of closing the slot 21 through which the spout moves, and preventing an excess of air from entering the furnace'and reducing. its efficiency, a curtain 51, of a fireproof material has been,

- provided. The curtain is preferably mounted on spring controlled rollers 52 at opposite sides of the furnace, so that it can wind or unwind readily as the spout travels. The

proj ecting plate 53 to which the curtain is attached is provided with openings 54 and *55for the reception of the spout 18 and the connecting 7 rod 45 respectively.

From the foregoing it will be evident that i a continuous feed of fuel may be obtained, which may be regulated according to con ditions, and that said fuel will be evenly distributed over the grate surface and a uniform fire maintained. It is evident also, that changes may be made in the design of the various elements without varying from the spirit of the invention, and therefore We \do not desire to restrict ourselves to the-exact construction shown.

We claim 1. In an apparatus for feeding fuel to furnaces, the combination with a furnace having a. slot'in the front wall thereof, of aspout extending into the furnace .through said slot and adapted to be moved parallel to its original'position across the full width of'the furnace, a supply tube for conveying the fuel to the spout argd an injector for projecting the fuel into the furnace.

2.. In an apparatus for feeding fuel to furnaces, the combination with a. furnace having a slot in the front wall thereof, of a spout extending into the furnace through said slot, means for moving the spout parallel to its original posit-ion for the'fpll width of the furnace, means for supplying fuel to the spout and means for projecting the fuel into the furnace.

3. In an apparatus for feeding coal to furnaces, a furnace, a spoutadapted to be moved parallel to its original position for the full width of the furnace extending into the furnace, means for varying the supply of coal to the spout and means for projecting the. coal into the furnace.

a. In an apparatus for feeding coal to furnaces, the combination of a furnace, a 1

coal supply, a spout, 'means for regulating the supply of coal to the spout, means for the coal from the spout, means for moving the spout laterally parallel to its original position across the furnace, a deflector plate mounted on the end of the spout and means for oscillating the defiectorplate to continuously vary the angle between the plate and the spout. ADAM HEBERER. HENRY A. HYNE. Witnesses:

H. G. Pnosr,

M. REGNER. 

